Mental hygiene has become a byword, a common term in the phraseology of today, but few people have a true conception of the meaning of the term. To most of us it is a catchall phrase which we carelessly and frequently use, along with other scientific terms, as a means of showing off our rapid strides in scientific education and attainments. here's another means of providing. The school child, the businessman and woman, the professional man, the wealthy and the poor alike use these two words, “mental hygiene,” but each maintains his own individual connotations, the one differing considerably from the other.